/**
 * Copyright 2019-2022 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef FRAMEWORK_GRAPH_CORE_CGRAPH_GRAPH_LISTENER_H
#define FRAMEWORK_GRAPH_CORE_CGRAPH_GRAPH_LISTENER_H

// inc/api
#include "graph/graph_api_export.h"

namespace ge {
class Node;
class Edge;
class ComputeGraph;
class GraphNotifier;

class GRAPH_API_EXPORT GraphListener {
public:
    virtual void OnAddNode(Node&) {}
    virtual void OnDelNode(const Node&) {}
    virtual void OnAddEdge(const Edge&) {}
    virtual void OnDelEdge(const Edge&) {}
    virtual void OnTopoChanged() {}

    virtual ~GraphListener() = default;
};

class GRAPH_API_EXPORT AutoGraphListener {
public:
    AutoGraphListener(GraphNotifier& notifier, GraphListener& listener);
    ~AutoGraphListener();

private:
    GraphNotifier& notifier_;
    GraphListener& listener_;
};
} // namespace ge

#endif // FRAMEWORK_GRAPH_CORE_CGRAPH_GRAPH_LISTENER_H